> On Saturday 08 February 2003 05:41 pm, David Dawes wrote:
> > On Sat, Feb 08, 2003 at 01:07:25PM -0700, patrick charles wrote:
> > >How would I communicate this? Somebody on XFree86 working with or have
> > > contact with the appropriate people in kernel/agpgart development?
> >
> > First of all, how are you "killing" the X server? I haven't seen this
> > behaviour when the X server exits normally, and I've done a lot of
> > testing where 32MB is allocated per run on machines with only 128MB of
> > physical memory.
> >
> > There are people here familiar with the kernel agpgart driver.
> >
> > Note that just because top shows that there's little memory free doesn't
> > mean that the agpgart driver isn't freeing it. Also the agpgart driver
> > allocates physical pages, never swap. I'm not sure what the symptoms
> > are when it can't get any free physical pages. On my test system the
> > free memory indicated by top does go up when the X server exits, and
> > this is on an otherwise idle system.
> >
> > So, I'd suggest starting a bare X server (run just 'X') on an otherwise
> > idle system, see what top reports, then exit it cleanly
> > (<Ctrl><Alt><Backspace>), and see if the free memory amount changes.
> > Check the X server log to confirm how much memory was allocated via the
> > agpgart mechanism (look for the lines containing "Allocated").
> >
> > If that looks OK, then try the same thing you tried before but with a
> > bare X server and an idle system.
> >
> > David
David,
I ran some tests as you suggested. I started up a bare X server using the command 'X'
on an idle system. I then exited cleanly using ctrl-alt-bak.
I recorded the amount of physical RAM free before and after the X start. I repeated
this process.
After 13 iterations, the machine became very sluggish.
After 16 iterations, the machine hung.
Still looks like X (or, the agpgart driver?) is not freeing resources.
The machine gradually ran out of physical RAM.
Let me know if I can provide any more information, XFree86 logs, or?
Details attached.
thanks,
-pat
[ 0] after fresh boot
w/ no X running: 84,516K free
[ 1] after running 'X': 56,472K free
[ 1] after ctrl-alt-bak: 68,796K free
[ 2] after running 'X': 48,104K free
[ 2] after ctrl-alt-bak: 60,656K free
[ 3] after running 'X': 40,716K free
[ 3] after ctrl-alt-bak: 53,272K free
[ 4] after running 'X': 33,228K free
[ 4] after ctrl-alt-bak: 45,784K free
[ 5] after running 'X': 25,888K free
[ 5] after ctrl-alt-bak: 38,472K free
[ 6] after running 'X': 18,572K free
[ 6] after ctrl-alt-bak: 31,116K free
[ 7] after running 'X': 11,372K free
[ 7] after ctrl-alt-bak: 23,672K free
[ 8] after running 'X': 4,096K free
[ 8] after ctrl-alt-bak: 16,344K free
[ 9] after running 'X': 1,060K free
[ 9] after ctrl-alt-bak: 13,856K free
[10] after running 'X': 1,180K free
[10] after ctrl-alt-bak: 13,640K free
[11] after running 'X': 952K free
[11] after ctrl-alt-bak: 13,400K free
[12] after running 'X': 984K free
[12] after ctrl-alt-bak: 13,400K free
[13] after running 'X': 948K free
[13] after ctrl-alt-bak: 13,400K free
[14] after running 'X': 948K free
[14] after ctrl-alt-bak: 10,000K free
[15] after running 'X': 944K free
[15] after ctrl-alt-bak: 5,704K free
[16] after running 'X': [machine hung]
[16]
After iteration #9, the machine started showing disk swap in use:
[ 9] 436K swap used
[10] 636K swap used
[11] 1,088K swap used
[12] 4,532K swap used
[13] 8,444K swap used
[14] 12,088K swap used
[15] 12,492K swap used
After iteration #13, the machine starts to behave sluggishly, both at the command-line
and when painting/moving the cross-hair cursor on the bare X desktop. Presumably
because components of the core o/s are being swapped in and out of RAM?
After 16 iterations, X hung on startup, the cross-hair cursor didn't appear. All your
base are belong to us. I couldn't stop X and got no response when trying to remotely
ssh to the machine.
System is a Dell GX60 with integrated intel extreme graphics
XFree86 Version 4.2.99.901 (4.3.0 RC 1)
Driver is i810
Kernel is 2.4.20-2.36
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